diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/configure.in')
| -rw-r--r-- | sysdeps/unix/sysv/linux/configure.in | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/configure.in b/sysdeps/unix/sysv/linux/configure.in index 2c425c5f25..021b4731eb 100644 --- a/sysdeps/unix/sysv/linux/configure.in +++ b/sysdeps/unix/sysv/linux/configure.in @@ -34,6 +34,33 @@ make sure that file was built correctly when installing the kernel header files. To use kernel headers not from /usr/include/linux, use the configure option --with-headers.]) fi + +# If the user gave a minimal version number test whether the available +# kernel headers are young enough. +if test -n "$minimum_kernel"; then + AC_MSG_CHECKING(for kernel header at least $minimum_kernel) +changequote(,)dnl + decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\(\([0-9]*\)\|\).*/(\1 * 65536 + \2 * 256 + \3)/'`; +changequote([,])dnl + cat > conftest.$ac_ext <<EOF +#include <linux/version.h> +int main() { +#if LINUX_VERSION_CODE < $decnum +eat flaming death +#endif +; return 0; } +EOF + if { (eval echo configure:30: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then + AC_DEFINE_UNQUOTED(__LINUX_KERNEL_VERSION, $decnum) + AC_MSG_RESULT(ok) + else + AC_MSG_RESULT(too old!) + AC_MSG_ERROR([*** The available kernel headers are not at least as old as the requested +*** compatible kernel version]) + fi + rm -f conftest* +fi + if test -n "$sysheaders"; then CFLAGS=$OLD_CFLAGS fi |